# Complete brain wiring diagrams

- kind: problem
- status: partial
- year: 1972

**Statement.** Can the complete synaptic wiring of a brain be mapped, and does it explain behavior?

The fly connectome was mapped with a mix of machine segmentation and crowd proofreading. A mouse brain is about 500 times larger. Whether wiring alone predicts behavior is itself an open question: C. elegans has been mapped for decades and is not yet fully understood.

Closed 1986, C. elegans (302 neurons); 2024, the adult fruit fly brain (about 140,000 neurons), FlyWire.

## Sources

- [Wikipedia: Connectome](https://en.wikipedia.org/wiki/Connectome)

[The brain](/wiki/Space:neuroscience.md) · [Mind](/wiki/Continent:mind.md)

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